<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
<style>
  html,
  body {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100%;
  }
</style>
  </head>
  <body>
  <div id="content" style="display: block; width: 100%; text-align: center"></div>
  </body>
</html>
